display: green; applying the web sustainability guidelines - Hidde de Vries - CSS Day 2025

The tech sector has an elephant in the room: we use too much energy. In 2024, the World Bank estimated the internet to account for 1-4% of global greenhouse emissions, similar to aviation. The good news is: there are documented and measurable opportunities to improve. From code to infrastructure. In this talk, we’ll look at best practices from the W3C’s new Web Sustainability Guidelines and beyond, focusing on lessons you can apply today. Slides: https://talks.hiddedevries.nl/3do3c4/display-green-applying-the-web-sustainability-guidelines *** A session from CSS Day, the CSS conference. Each June in Amsterdam; see https://cssday.nl for more information. Conference announcements in your inbox? https://cssday.nl/subscribe